OBD-II Generic Error Code P0745: How to Fix It

Medium 1-3 hours Medium Severity Verified June 2026
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Error Code
P0745
Brand
OBD-II Generic
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
1-3 hours
Error code P0745 means the transmission control module (TCM) has detected a problem with pressure control solenoid A. This solenoid regulates hydraulic pressure to control shifting. Ignoring it can lead to rough shifting or transmission damage.
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Tools You'll Need

How to Fix Error Code P0745

  1. Check Transmission Fluid Level and Condition

    Ensure the engine is running and in Park (or Neutral for manual). Use caution with hot fluid.

  2. Scan for Additional Codes

  3. Inspect Wiring and Connectors

    Disconnect the battery negative terminal before working on electrical components.

  4. Test Solenoid Resistance

    Work in a well-ventilated area. Transmission fluid may be hot.

  5. Replace Pressure Control Solenoid A

    Torque pan bolts to spec. Use correct fluid type. Dispose of old fluid properly.

Parts You May Need

Pressure control solenoid A
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Transmission pan gasket
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Pressure control solenoid A
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Transmission pan gasket
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Pressure control solenoid A
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Transmission pan gasket
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Pressure control solenoid A
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Transmission pan gasket
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When to Call a Professional

If you are not comfortable dropping the transmission pan or working with transmission fluid, or if the code persists after replacing the solenoid, consult a professional mechanic. Internal transmission damage may require specialized repair.

Frequently Asked Questions

Can I drive with a P0745 code?
You may be able to drive short distances, but it can cause harsh shifting, slipping, or transmission overheating. It's best to repair it promptly to avoid more expensive damage.
What causes P0745?
Common causes include low or dirty transmission fluid, faulty pressure control solenoid, wiring issues, or a malfunctioning transmission control module.
How much does it cost to fix P0745?
DIY cost: $30-$80 for a solenoid and fluid. Mechanic cost: $300-$800 depending on labor and parts.
Is P0745 serious?
Yes, it can lead to transmission failure if ignored. Severity is medium; prompt repair is recommended.
Will clearing the code fix P0745?
Clearing the code may temporarily turn off the check engine light, but the problem will return unless the underlying issue is fixed.

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